Pets can enter and exit freely: the screen door is equipped with magnets at the bottom and closes automatically. Two sliding latches at the bottom of the flap help you lock the dog door to keep your pets in when you’re not home. Easy Installation: The dog door is easy to install. You can install it yourself. The cat flap package includes screws and installation instructions. Size: inner frame (28cm x 33cm) outer frame (34cm x 44cm), choose the appropriate height for the pet door. installation according to the size of your dog. Suitable for most small and large dogs, cats or other pets, but not suitable for very small pets because the flap swings too much. Application: The pet flap does not can be installed only over existing screen doors, hallways and windows or other screen windows. They cannot be used for very thick wooden and glass doors. If you have any questions during installation, please feel free to contact us. Material: The mosquito net door dog flap is made of ABS material,